Consider the following three straight lines.D?: (x, y, z) = (2,4, ? 1) + s(2, ? 1,3)x = -1 + 2kD?: y = 1+ 3kZ=-6+4kD3: (x, y, z) = (–7,8, ? 14) + t(?4,2, ? 6)|Using these lines, form:a) a pair of parallel lines;(b) a pair of intersecting lines (indicate the point of intersection);c) a pair of left lines.Justify your answers.